RDAP
The Registration Data Access Protocol (RDAP) is the authoritative source for IP ownership. Unlike commercial GeoIP services or provider marketing pages, RDAP data is maintained by Regional Internet Registries (RIRs) such as RIPE NCC, ARIN, and APNIC. It tells us precisely who has been provided with the netblock.
From RDAP, we obtain:
NetRange: The range of addresses delegated. Organisation: The registered holder (e.g., Amazon, Vodafone, TryHackMe). Remarks: Often include whether the block is used for hosting, broadband, or mobile. Abuse Contact: The official mailbox for incident reporting.
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